android: the handoff — the pending rounds, the pipeline, and what is unverified

Everything written this session that has not been through the device: rounds 43
to 48 (each patch adversarially verified, 43's transient-notice expectation
fixed), a partial round 49, the pipeline scripts, the Android Auto design and
the icon comparison mock. Also the two harness changes that were never A/B'd —
adaptive waits, which may only shorten a declared wait and never lengthen it,
and a ship that runs the mock walk and the deploy at the same time. The A/B and
its 255-step baseline are in handoff/tools; main stays at what the phone has
actually walked.

handoff/rounds/ins-r35-phone-steps.txt

@@ -0,0 +1,10 @@
+    /* export, on the real core: the file is built by the desktop's own
+       writers and handed to Android's create-document sheet. That sheet is
+       a system activity the walk cannot tap, so BACK dismisses it — the
+       cancel path is what gets walked, and NOTHING is written to this
+       phone's storage. The playlist is the "Walk test" one the walk itself
+       makes, and deletes three steps below. */
+    { do: `document.querySelectorAll('.gbar .iconbtn')[1].click()`, wait: 800 },
+    { do: `__click('.halfsheet .row', 'Export')`, name: "export-door", wait: 800 },
+    { do: `__click('.halfsheet .row', 'M3U8')`, name: "export-picker", wait: 2600 },
+    { adb: ["shell", "input", "keyevent", "4"], name: "export-dismissed", wait: 2000 },